sys/contrib/openzfs/config/kernel-blkdev.m4

   1 dnl #
   2 dnl # 2.6.38 API change,
   3 dnl # Added blkdev_get_by_path()
   4 dnl #
   5 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH], [
   6         ZFS_LINUX_TEST_SRC([blkdev_get_by_path], [
   7                 #include <linux/fs.h>
   8                 #include <linux/blkdev.h>
   9         ], [
  10                 struct block_device *bdev __attribute__ ((unused)) = NULL;
  11                 const char *path = "path";
  12                 fmode_t mode = 0;
  13                 void *holder = NULL;
  14
  15                 bdev = blkdev_get_by_path(path, mode, holder);
  16         ])
  17 ])
  18
  19 dnl #
  20 dnl # 6.5.x API change,
  21 dnl # blkdev_get_by_path() takes 4 args
  22 dnl #
  23 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH_4ARG], [
  24         ZFS_LINUX_TEST_SRC([blkdev_get_by_path_4arg], [
  25                 #include <linux/fs.h>
  26                 #include <linux/blkdev.h>
  27         ], [
  28                 struct block_device *bdev __attribute__ ((unused)) = NULL;
  29                 const char *path = "path";
  30                 fmode_t mode = 0;
  31                 void *holder = NULL;
  32                 struct blk_holder_ops h;
  33
  34                 bdev = blkdev_get_by_path(path, mode, holder, &h);
  35         ])
  36 ])
  37
  38 dnl #
  39 dnl # 6.8.x API change
  40 dnl # bdev_open_by_path() replaces blkdev_get_by_path()
  41 dnl #
  42 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_OPEN_BY_PATH], [
  43         ZFS_LINUX_TEST_SRC([bdev_open_by_path], [
  44                 #include <linux/fs.h>
  45                 #include <linux/blkdev.h>
  46         ], [
  47                 struct bdev_handle *bdh __attribute__ ((unused)) = NULL;
  48                 const char *path = "path";
  49                 fmode_t mode = 0;
  50                 void *holder = NULL;
  51                 struct blk_holder_ops h;
  52
  53                 bdh = bdev_open_by_path(path, mode, holder, &h);
  54         ])
  55 ])
  56
  57 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH], [
  58         AC_MSG_CHECKING([whether blkdev_get_by_path() exists and takes 3 args])
  59         ZFS_LINUX_TEST_RESULT([blkdev_get_by_path], [
  60                 AC_MSG_RESULT(yes)
  61         ], [
  62                 AC_MSG_RESULT(no)
  63                 AC_MSG_CHECKING([whether blkdev_get_by_path() exists and takes 4 args])
  64                 ZFS_LINUX_TEST_RESULT([blkdev_get_by_path_4arg], [
  65                         AC_DEFINE(HAVE_BLKDEV_GET_BY_PATH_4ARG, 1,
  66                                 [blkdev_get_by_path() exists and takes 4 args])
  67                         AC_MSG_RESULT(yes)
  68                 ], [
  69                         AC_MSG_RESULT(no)
  70                         AC_MSG_CHECKING([whether bdev_open_by_path() exists])
  71                         ZFS_LINUX_TEST_RESULT([bdev_open_by_path], [
  72                                 AC_DEFINE(HAVE_BDEV_OPEN_BY_PATH, 1,
  73                                         [bdev_open_by_path() exists])
  74                                 AC_MSG_RESULT(yes)
  75                         ], [
  76                                 ZFS_LINUX_TEST_ERROR([blkdev_get_by_path()])
  77                         ])
  78                 ])
  79         ])
  80 ])
  81
  82 dnl #
  83 dnl # 6.5.x API change
  84 dnl # blk_mode_t was added as a type to supercede some places where fmode_t
  85 dnl # is used
  86 dnl #
  87 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BLK_MODE_T], [
  88         ZFS_LINUX_TEST_SRC([blk_mode_t], [
  89                 #include <linux/fs.h>
  90                 #include <linux/blkdev.h>
  91         ], [
  92                 blk_mode_t m __attribute((unused)) = (blk_mode_t)0;
  93         ])
  94 ])
  95
  96 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BLK_MODE_T], [
  97         AC_MSG_CHECKING([whether blk_mode_t is defined])
  98         ZFS_LINUX_TEST_RESULT([blk_mode_t], [
  99                 AC_MSG_RESULT(yes)
 100                 AC_DEFINE(HAVE_BLK_MODE_T, 1, [blk_mode_t is defined])
 101         ], [
 102                 AC_MSG_RESULT(no)
 103         ])
 104 ])
 105
 106 dnl #
 107 dnl # 2.6.38 API change,
 108 dnl # Added blkdev_put()
 109 dnl #
 110 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT], [
 111         ZFS_LINUX_TEST_SRC([blkdev_put], [
 112                 #include <linux/fs.h>
 113                 #include <linux/blkdev.h>
 114         ], [
 115                 struct block_device *bdev = NULL;
 116                 fmode_t mode = 0;
 117
 118                 blkdev_put(bdev, mode);
 119         ])
 120 ])
 121
 122 dnl #
 123 dnl # 6.5.x API change.
 124 dnl # blkdev_put() takes (void* holder) as arg 2
 125 dnl #
 126 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PUT_HOLDER], [
 127         ZFS_LINUX_TEST_SRC([blkdev_put_holder], [
 128                 #include <linux/fs.h>
 129                 #include <linux/blkdev.h>
 130         ], [
 131                 struct block_device *bdev = NULL;
 132                 void *holder = NULL;
 133
 134                 blkdev_put(bdev, holder);
 135         ])
 136 ])
 137
 138 dnl #
 139 dnl # 6.8.x API change
 140 dnl # bdev_release() replaces blkdev_put()
 141 dnl #
 142 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_RELEASE], [
 143         ZFS_LINUX_TEST_SRC([bdev_release], [
 144                 #include <linux/fs.h>
 145                 #include <linux/blkdev.h>
 146         ], [
 147                 struct bdev_handle *bdh = NULL;
 148                 bdev_release(bdh);
 149         ])
 150 ])
 151
 152 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PUT], [
 153         AC_MSG_CHECKING([whether blkdev_put() exists])
 154         ZFS_LINUX_TEST_RESULT([blkdev_put], [
 155                 AC_MSG_RESULT(yes)
 156         ], [
 157                 AC_MSG_RESULT(no)
 158                 AC_MSG_CHECKING([whether blkdev_put() accepts void* as arg 2])
 159                 ZFS_LINUX_TEST_RESULT([blkdev_put_holder], [
 160                         AC_MSG_RESULT(yes)
 161                         AC_DEFINE(HAVE_BLKDEV_PUT_HOLDER, 1,
 162                                 [blkdev_put() accepts void* as arg 2])
 163                 ], [
 164                         AC_MSG_RESULT(no)
 165                         AC_MSG_CHECKING([whether bdev_release() exists])
 166                         ZFS_LINUX_TEST_RESULT([bdev_release], [
 167                                 AC_MSG_RESULT(yes)
 168                                 AC_DEFINE(HAVE_BDEV_RELEASE, 1,
 169                                         [bdev_release() exists])
 170                         ], [
 171                                 ZFS_LINUX_TEST_ERROR([blkdev_put()])
 172                         ])
 173                 ])
 174         ])
 175 ])
 176
 177 dnl #
 178 dnl # 4.1 API, exported blkdev_reread_part() symbol, back ported to the
 179 dnl # 3.10.0 CentOS 7.x enterprise kernels.
 180 dnl #
 181 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART], [
 182         ZFS_LINUX_TEST_SRC([blkdev_reread_part], [
 183                 #include <linux/fs.h>
 184                 #include <linux/blkdev.h>
 185         ], [
 186                 struct block_device *bdev = NULL;
 187                 int error;
 188
 189                 error = blkdev_reread_part(bdev);
 190         ])
 191 ])
 192
 193 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_REREAD_PART], [
 194         AC_MSG_CHECKING([whether blkdev_reread_part() exists])
 195         ZFS_LINUX_TEST_RESULT([blkdev_reread_part], [
 196                 AC_MSG_RESULT(yes)
 197                 AC_DEFINE(HAVE_BLKDEV_REREAD_PART, 1,
 198                     [blkdev_reread_part() exists])
 199         ], [
 200                 AC_MSG_RESULT(no)
 201         ])
 202 ])
 203
 204 dnl #
 205 dnl # check_disk_change() was removed in 5.10
 206 dnl #
 207 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_CHECK_DISK_CHANGE], [
 208         ZFS_LINUX_TEST_SRC([check_disk_change], [
 209                 #include <linux/fs.h>
 210                 #include <linux/blkdev.h>
 211         ], [
 212                 struct block_device *bdev = NULL;
 213                 bool error;
 214
 215                 error = check_disk_change(bdev);
 216         ])
 217 ])
 218
 219 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_CHECK_DISK_CHANGE], [
 220         AC_MSG_CHECKING([whether check_disk_change() exists])
 221         ZFS_LINUX_TEST_RESULT([check_disk_change], [
 222                 AC_MSG_RESULT(yes)
 223                 AC_DEFINE(HAVE_CHECK_DISK_CHANGE, 1,
 224                     [check_disk_change() exists])
 225         ], [
 226                 AC_MSG_RESULT(no)
 227         ])
 228 ])
 229
 230 dnl #
 231 dnl # 6.5.x API change
 232 dnl # disk_check_media_change() was added
 233 dnl #
 234 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_DISK_CHECK_MEDIA_CHANGE], [
 235         ZFS_LINUX_TEST_SRC([disk_check_media_change], [
 236                 #include <linux/fs.h>
 237                 #include <linux/blkdev.h>
 238         ], [
 239                 struct block_device *bdev = NULL;
 240                 bool error;
 241
 242                 error = disk_check_media_change(bdev->bd_disk);
 243         ])
 244 ])
 245
 246 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_DISK_CHECK_MEDIA_CHANGE], [
 247         AC_MSG_CHECKING([whether disk_check_media_change() exists])
 248         ZFS_LINUX_TEST_RESULT([disk_check_media_change], [
 249                 AC_MSG_RESULT(yes)
 250                 AC_DEFINE(HAVE_DISK_CHECK_MEDIA_CHANGE, 1,
 251                     [disk_check_media_change() exists])
 252         ], [
 253                 AC_MSG_RESULT(no)
 254         ])
 255 ])
 256
 257 dnl #
 258 dnl # bdev_kobj() is introduced from 5.12
 259 dnl #
 260 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_KOBJ], [
 261         ZFS_LINUX_TEST_SRC([bdev_kobj], [
 262                 #include <linux/fs.h>
 263                 #include <linux/blkdev.h>
 264                 #include <linux/kobject.h>
 265         ], [
 266                 struct block_device *bdev = NULL;
 267                 struct kobject *disk_kobj;
 268                 disk_kobj = bdev_kobj(bdev);
 269         ])
 270 ])
 271
 272 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_KOBJ], [
 273         AC_MSG_CHECKING([whether bdev_kobj() exists])
 274         ZFS_LINUX_TEST_RESULT([bdev_kobj], [
 275                 AC_MSG_RESULT(yes)
 276                 AC_DEFINE(HAVE_BDEV_KOBJ, 1,
 277                     [bdev_kobj() exists])
 278         ], [
 279                 AC_MSG_RESULT(no)
 280         ])
 281 ])
 282
 283 dnl #
 284 dnl # part_to_dev() was removed in 5.12
 285 dnl #
 286 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_PART_TO_DEV], [
 287         ZFS_LINUX_TEST_SRC([part_to_dev], [
 288                 #include <linux/fs.h>
 289                 #include <linux/blkdev.h>
 290         ], [
 291                 struct hd_struct *p = NULL;
 292                 struct device *pdev;
 293                 pdev = part_to_dev(p);
 294         ])
 295 ])
 296
 297 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_PART_TO_DEV], [
 298         AC_MSG_CHECKING([whether part_to_dev() exists])
 299         ZFS_LINUX_TEST_RESULT([part_to_dev], [
 300                 AC_MSG_RESULT(yes)
 301                 AC_DEFINE(HAVE_PART_TO_DEV, 1,
 302                     [part_to_dev() exists])
 303         ], [
 304                 AC_MSG_RESULT(no)
 305         ])
 306 ])
 307
 308 dnl #
 309 dnl # 5.10 API, check_disk_change() is removed, in favor of
 310 dnl # bdev_check_media_change(), which doesn't force revalidation
 311 dnl #
 312 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_CHECK_MEDIA_CHANGE], [
 313         ZFS_LINUX_TEST_SRC([bdev_check_media_change], [
 314                 #include <linux/fs.h>
 315                 #include <linux/blkdev.h>
 316         ], [
 317                 struct block_device *bdev = NULL;
 318                 int error;
 319
 320                 error = bdev_check_media_change(bdev);
 321         ])
 322 ])
 323
 324 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_CHECK_MEDIA_CHANGE], [
 325         AC_MSG_CHECKING([whether bdev_check_media_change() exists])
 326         ZFS_LINUX_TEST_RESULT([bdev_check_media_change], [
 327                 AC_MSG_RESULT(yes)
 328                 AC_DEFINE(HAVE_BDEV_CHECK_MEDIA_CHANGE, 1,
 329                     [bdev_check_media_change() exists])
 330         ], [
 331                 AC_MSG_RESULT(no)
 332         ])
 333 ])
 334
 335 dnl #
 336 dnl # 2.6.22 API change
 337 dnl # Single argument invalidate_bdev()
 338 dnl #
 339 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV], [
 340         ZFS_LINUX_TEST_SRC([invalidate_bdev], [
 341                 #include <linux/buffer_head.h>
 342                 #include <linux/blkdev.h>
 343         ],[
 344                 struct block_device *bdev = NULL;
 345                 invalidate_bdev(bdev);
 346         ])
 347 ])
 348
 349 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV], [
 350         AC_MSG_CHECKING([whether invalidate_bdev() exists])
 351         ZFS_LINUX_TEST_RESULT([invalidate_bdev], [
 352                 AC_MSG_RESULT(yes)
 353         ],[
 354                 ZFS_LINUX_TEST_ERROR([invalidate_bdev()])
 355         ])
 356 ])
 357
 358 dnl #
 359 dnl # 5.11 API, lookup_bdev() takes dev_t argument.
 360 dnl # 2.6.27 API, lookup_bdev() was first exported.
 361 dnl # 4.4.0-6.21 API, lookup_bdev() on Ubuntu takes mode argument.
 362 dnl #
 363 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV], [
 364         ZFS_LINUX_TEST_SRC([lookup_bdev_devt], [
 365                 #include <linux/blkdev.h>
 366         ], [
 367                 int error __attribute__ ((unused));
 368                 const char path[] = "/example/path";
 369                 dev_t dev;
 370
 371                 error = lookup_bdev(path, &dev);
 372         ])
 373
 374         ZFS_LINUX_TEST_SRC([lookup_bdev_1arg], [
 375                 #include <linux/fs.h>
 376                 #include <linux/blkdev.h>
 377         ], [
 378                 struct block_device *bdev __attribute__ ((unused));
 379                 const char path[] = "/example/path";
 380
 381                 bdev = lookup_bdev(path);
 382         ])
 383
 384         ZFS_LINUX_TEST_SRC([lookup_bdev_mode], [
 385                 #include <linux/fs.h>
 386         ], [
 387                 struct block_device *bdev __attribute__ ((unused));
 388                 const char path[] = "/example/path";
 389
 390                 bdev = lookup_bdev(path, FMODE_READ);
 391         ])
 392 ])
 393
 394 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV], [
 395         AC_MSG_CHECKING([whether lookup_bdev() wants dev_t arg])
 396         ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_devt],
 397             [lookup_bdev], [fs/block_dev.c], [
 398                 AC_MSG_RESULT(yes)
 399                 AC_DEFINE(HAVE_DEVT_LOOKUP_BDEV, 1,
 400                     [lookup_bdev() wants dev_t arg])
 401         ], [
 402                 AC_MSG_RESULT(no)
 403
 404                 AC_MSG_CHECKING([whether lookup_bdev() wants 1 arg])
 405                 ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_1arg],
 406                     [lookup_bdev], [fs/block_dev.c], [
 407                         AC_MSG_RESULT(yes)
 408                         AC_DEFINE(HAVE_1ARG_LOOKUP_BDEV, 1,
 409                             [lookup_bdev() wants 1 arg])
 410                 ], [
 411                         AC_MSG_RESULT(no)
 412
 413                         AC_MSG_CHECKING([whether lookup_bdev() wants mode arg])
 414                         ZFS_LINUX_TEST_RESULT_SYMBOL([lookup_bdev_mode],
 415                             [lookup_bdev], [fs/block_dev.c], [
 416                                 AC_MSG_RESULT(yes)
 417                                 AC_DEFINE(HAVE_MODE_LOOKUP_BDEV, 1,
 418                                     [lookup_bdev() wants mode arg])
 419                         ], [
 420                                 ZFS_LINUX_TEST_ERROR([lookup_bdev()])
 421                         ])
 422                 ])
 423         ])
 424 ])
 425
 426 dnl #
 427 dnl # 2.6.30 API change
 428 dnl #
 429 dnl # The bdev_physical_block_size() interface was added to provide a way
 430 dnl # to determine the smallest write which can be performed without a
 431 dnl # read-modify-write operation.
 432 dnl #
 433 dnl # Unfortunately, this interface isn't entirely reliable because
 434 dnl # drives are sometimes known to misreport this value.
 435 dnl #
 436 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
 437         ZFS_LINUX_TEST_SRC([bdev_physical_block_size], [
 438                 #include <linux/blkdev.h>
 439         ],[
 440                 struct block_device *bdev __attribute__ ((unused)) = NULL;
 441                 bdev_physical_block_size(bdev);
 442         ])
 443 ])
 444
 445 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE], [
 446         AC_MSG_CHECKING([whether bdev_physical_block_size() is available])
 447         ZFS_LINUX_TEST_RESULT([bdev_physical_block_size], [
 448                 AC_MSG_RESULT(yes)
 449         ],[
 450                 ZFS_LINUX_TEST_ERROR([bdev_physical_block_size()])
 451         ])
 452 ])
 453
 454 dnl #
 455 dnl # 2.6.30 API change
 456 dnl # Added bdev_logical_block_size().
 457 dnl #
 458 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
 459         ZFS_LINUX_TEST_SRC([bdev_logical_block_size], [
 460                 #include <linux/blkdev.h>
 461         ],[
 462                 struct block_device *bdev __attribute__ ((unused)) = NULL;
 463                 bdev_logical_block_size(bdev);
 464         ])
 465 ])
 466
 467 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE], [
 468         AC_MSG_CHECKING([whether bdev_logical_block_size() is available])
 469         ZFS_LINUX_TEST_RESULT([bdev_logical_block_size], [
 470                 AC_MSG_RESULT(yes)
 471         ],[
 472                 ZFS_LINUX_TEST_ERROR([bdev_logical_block_size()])
 473         ])
 474 ])
 475
 476 dnl #
 477 dnl # 5.11 API change
 478 dnl # Added bdev_whole() helper.
 479 dnl #
 480 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_WHOLE], [
 481         ZFS_LINUX_TEST_SRC([bdev_whole], [
 482                 #include <linux/blkdev.h>
 483         ],[
 484                 struct block_device *bdev = NULL;
 485                 bdev = bdev_whole(bdev);
 486         ])
 487 ])
 488
 489 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEV_WHOLE], [
 490         AC_MSG_CHECKING([whether bdev_whole() is available])
 491         ZFS_LINUX_TEST_RESULT([bdev_whole], [
 492                 AC_MSG_RESULT(yes)
 493                 AC_DEFINE(HAVE_BDEV_WHOLE, 1, [bdev_whole() is available])
 494         ],[
 495                 AC_MSG_RESULT(no)
 496         ])
 497 ])
 498
 499 dnl #
 500 dnl # 5.20 API change,
 501 dnl # Removed bdevname(), snprintf(.., %pg) should be used.
 502 dnl #
 503 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BDEVNAME], [
 504         ZFS_LINUX_TEST_SRC([bdevname], [
 505                 #include <linux/fs.h>
 506                 #include <linux/blkdev.h>
 507         ], [
 508                 struct block_device *bdev __attribute__ ((unused)) = NULL;
 509                 char path[BDEVNAME_SIZE];
 510
 511                 (void) bdevname(bdev, path);
 512         ])
 513 ])
 514
 515 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BDEVNAME], [
 516         AC_MSG_CHECKING([whether bdevname() exists])
 517         ZFS_LINUX_TEST_RESULT([bdevname], [
 518                 AC_DEFINE(HAVE_BDEVNAME, 1, [bdevname() is available])
 519                 AC_MSG_RESULT(yes)
 520         ], [
 521                 AC_MSG_RESULT(no)
 522         ])
 523 ])
 524
 525 dnl #
 526 dnl # 5.19 API: blkdev_issue_secure_erase()
 527 dnl # 4.7  API: __blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE)
 528 dnl # 3.10 API: blkdev_issue_discard(..., BLKDEV_DISCARD_SECURE)
 529 dnl #
 530 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE], [
 531         ZFS_LINUX_TEST_SRC([blkdev_issue_secure_erase], [
 532                 #include <linux/blkdev.h>
 533         ],[
 534                 struct block_device *bdev = NULL;
 535                 sector_t sector = 0;
 536                 sector_t nr_sects = 0;
 537                 int error __attribute__ ((unused));
 538
 539                 error = blkdev_issue_secure_erase(bdev,
 540                     sector, nr_sects, GFP_KERNEL);
 541         ])
 542
 543         ZFS_LINUX_TEST_SRC([blkdev_issue_discard_async_flags], [
 544                 #include <linux/blkdev.h>
 545         ],[
 546                 struct block_device *bdev = NULL;
 547                 sector_t sector = 0;
 548                 sector_t nr_sects = 0;
 549                 unsigned long flags = 0;
 550                 struct bio *biop = NULL;
 551                 int error __attribute__ ((unused));
 552
 553                 error = __blkdev_issue_discard(bdev,
 554                     sector, nr_sects, GFP_KERNEL, flags, &biop);
 555         ])
 556
 557         ZFS_LINUX_TEST_SRC([blkdev_issue_discard_flags], [
 558                 #include <linux/blkdev.h>
 559         ],[
 560                 struct block_device *bdev = NULL;
 561                 sector_t sector = 0;
 562                 sector_t nr_sects = 0;
 563                 unsigned long flags = 0;
 564                 int error __attribute__ ((unused));
 565
 566                 error = blkdev_issue_discard(bdev,
 567                     sector, nr_sects, GFP_KERNEL, flags);
 568         ])
 569 ])
 570
 571 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE], [
 572         AC_MSG_CHECKING([whether blkdev_issue_secure_erase() is available])
 573         ZFS_LINUX_TEST_RESULT([blkdev_issue_secure_erase], [
 574                 AC_MSG_RESULT(yes)
 575                 AC_DEFINE(HAVE_BLKDEV_ISSUE_SECURE_ERASE, 1,
 576                     [blkdev_issue_secure_erase() is available])
 577         ],[
 578                 AC_MSG_RESULT(no)
 579
 580                 AC_MSG_CHECKING([whether __blkdev_issue_discard() is available])
 581                 ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_async_flags], [
 582                         AC_MSG_RESULT(yes)
 583                         AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD_ASYNC, 1,
 584                             [__blkdev_issue_discard() is available])
 585                 ],[
 586                         AC_MSG_RESULT(no)
 587
 588                         AC_MSG_CHECKING([whether blkdev_issue_discard() is available])
 589                         ZFS_LINUX_TEST_RESULT([blkdev_issue_discard_flags], [
 590                                 AC_MSG_RESULT(yes)
 591                                 AC_DEFINE(HAVE_BLKDEV_ISSUE_DISCARD, 1,
 592                                         [blkdev_issue_discard() is available])
 593                         ],[
 594                                 ZFS_LINUX_TEST_ERROR([blkdev_issue_discard()])
 595                         ])
 596                 ])
 597         ])
 598 ])
 599
 600 dnl #
 601 dnl # 5.13 API change
 602 dnl # blkdev_get_by_path() no longer handles ERESTARTSYS
 603 dnl #
 604 dnl # Unfortunately we're forced to rely solely on the kernel version
 605 dnl # number in order to determine the expected behavior.  This was an
 606 dnl # internal change to blkdev_get_by_dev(), see commit a8ed1a0607.
 607 dnl #
 608 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_GET_ERESTARTSYS], [
 609         AC_MSG_CHECKING([whether blkdev_get_by_path() handles ERESTARTSYS])
 610         AS_VERSION_COMPARE([$LINUX_VERSION], [5.13.0], [
 611                 AC_MSG_RESULT(yes)
 612                 AC_DEFINE(HAVE_BLKDEV_GET_ERESTARTSYS, 1,
 613                         [blkdev_get_by_path() handles ERESTARTSYS])
 614         ],[
 615                 AC_MSG_RESULT(no)
 616         ],[
 617                 AC_MSG_RESULT(no)
 618         ])
 619 ])
 620
 621 dnl #
 622 dnl # 6.5.x API change
 623 dnl # BLK_STS_NEXUS replaced with BLK_STS_RESV_CONFLICT
 624 dnl #
 625 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV_BLK_STS_RESV_CONFLICT], [
 626         ZFS_LINUX_TEST_SRC([blk_sts_resv_conflict], [
 627                 #include <linux/blkdev.h>
 628         ],[
 629                 blk_status_t s __attribute__ ((unused)) = BLK_STS_RESV_CONFLICT;
 630         ])
 631 ])
 632
 633 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV_BLK_STS_RESV_CONFLICT], [
 634         AC_MSG_CHECKING([whether BLK_STS_RESV_CONFLICT is defined])
 635                 ZFS_LINUX_TEST_RESULT([blk_sts_resv_conflict], [
 636                         AC_DEFINE(HAVE_BLK_STS_RESV_CONFLICT, 1, [BLK_STS_RESV_CONFLICT is defined])
 637                         AC_MSG_RESULT(yes)
 638                 ], [
 639                         AC_MSG_RESULT(no)
 640                 ])
 641         ])
 642 ])
 643
 644 AC_DEFUN([ZFS_AC_KERNEL_SRC_BLKDEV], [
 645         ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH
 646         ZFS_AC_KERNEL_SRC_BLKDEV_GET_BY_PATH_4ARG
 647         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_OPEN_BY_PATH
 648         ZFS_AC_KERNEL_SRC_BLKDEV_PUT
 649         ZFS_AC_KERNEL_SRC_BLKDEV_PUT_HOLDER
 650         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_RELEASE
 651         ZFS_AC_KERNEL_SRC_BLKDEV_REREAD_PART
 652         ZFS_AC_KERNEL_SRC_BLKDEV_INVALIDATE_BDEV
 653         ZFS_AC_KERNEL_SRC_BLKDEV_LOOKUP_BDEV
 654         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
 655         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
 656         ZFS_AC_KERNEL_SRC_BLKDEV_CHECK_DISK_CHANGE
 657         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_CHECK_MEDIA_CHANGE
 658         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_WHOLE
 659         ZFS_AC_KERNEL_SRC_BLKDEV_BDEVNAME
 660         ZFS_AC_KERNEL_SRC_BLKDEV_ISSUE_SECURE_ERASE
 661         ZFS_AC_KERNEL_SRC_BLKDEV_BDEV_KOBJ
 662         ZFS_AC_KERNEL_SRC_BLKDEV_PART_TO_DEV
 663         ZFS_AC_KERNEL_SRC_BLKDEV_DISK_CHECK_MEDIA_CHANGE
 664         ZFS_AC_KERNEL_SRC_BLKDEV_BLK_STS_RESV_CONFLICT
 665         ZFS_AC_KERNEL_SRC_BLKDEV_BLK_MODE_T
 666 ])
 667
 668 AC_DEFUN([ZFS_AC_KERNEL_BLKDEV], [
 669         ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
 670         ZFS_AC_KERNEL_BLKDEV_PUT
 671         ZFS_AC_KERNEL_BLKDEV_REREAD_PART
 672         ZFS_AC_KERNEL_BLKDEV_INVALIDATE_BDEV
 673         ZFS_AC_KERNEL_BLKDEV_LOOKUP_BDEV
 674         ZFS_AC_KERNEL_BLKDEV_BDEV_LOGICAL_BLOCK_SIZE
 675         ZFS_AC_KERNEL_BLKDEV_BDEV_PHYSICAL_BLOCK_SIZE
 676         ZFS_AC_KERNEL_BLKDEV_CHECK_DISK_CHANGE
 677         ZFS_AC_KERNEL_BLKDEV_BDEV_CHECK_MEDIA_CHANGE
 678         ZFS_AC_KERNEL_BLKDEV_BDEV_WHOLE
 679         ZFS_AC_KERNEL_BLKDEV_BDEVNAME
 680         ZFS_AC_KERNEL_BLKDEV_GET_ERESTARTSYS
 681         ZFS_AC_KERNEL_BLKDEV_ISSUE_SECURE_ERASE
 682         ZFS_AC_KERNEL_BLKDEV_BDEV_KOBJ
 683         ZFS_AC_KERNEL_BLKDEV_PART_TO_DEV
 684         ZFS_AC_KERNEL_BLKDEV_DISK_CHECK_MEDIA_CHANGE
 685         ZFS_AC_KERNEL_BLKDEV_BLK_STS_RESV_CONFLICT
 686         ZFS_AC_KERNEL_BLKDEV_BLK_MODE_T
 687 ])